Acta Societatis pro Fauna et Flora Fennica, 53, N:o 1. 185 



Distr. Ad corticem Ulmi in Tolo prope Helsingforsiam (Vain.). 



Est variatio valde inconstans. — Thallus sicut in v. luteola 

 variabilis, verrucis et verruculis adnatis, depressis aut adscendenti- 

 bus, pallidis aut albidis aut cinereo-glaucescentibus. Apothecia crebra 

 aut sparsa, lat. 2 — O.s mm, disco piano aut demum convexo, opaco, 

 nudo, margine sat crasso aut mediocri, saepe prominente, interdum 

 demum flexuoso, persistente aut rarius demum excluso, pruina sub- 

 albida, tenui, valde inconstante. Perithecium chondroideum, hyphis 

 pachydermaticis, cavitatibus angustis, in margine pallidum aut dilute 

 rufescenti-pallidum. Hypothecium superne pallidum aut dilute ru- 

 fescenti-pallidum. Hymenium circ. O.oso mm crassum, totum dilute 

 pallidum, jodo persistenter caerulescens. Sporae apicibus obtusis aut 

 altero apice sensim attenuato, pluri-septatae (septas 9 vidi), long. O.044 — 

 0.064, crass. O.003 mm. 



Obs. Secundum variationes thalli et apotheciorum var. luieola 

 in formas plures habitu dissimiles, at valde inconstantes, dividi potest. 

 Inter eas notetur f. chlorotica (Ach.) Vain. {Lecidea luteola 6. chlo- 

 rotica Ach. Lich. Univ., 1810, p. 196), apotheciis testaceis a v. luteola 

 (in sensu strictiore) vel f. ochrocarpa (Stizenb.) differens. Ad corticem 

 sorbi in Tiirismaa in HoUola Tavastiae merid. legi. In hoc specimine 

 thallus albibus, parum evolutus, sporae long. 0.048 — O.oss, crass. O.002 mm, 

 circ. 6-septatae. In specimine orig. n. 300 (ad ramulos crescente) ex 

 Helvetia in herb. Ach. thallus verruculosus, verruculis granuliformibus, 

 pallido-albescentibus, apotheciis O.e — 0.3 mm latis, testaceis, margine 

 tenui, demum excluso, hymenio O.090 — O.120 mm crasso, jodo persistenter 

 caerulescente, perithecio chondroideo, sporis long. circ. O.oso, crass. 

 0.0025 mm. N. 284 (item ex Helvetia, at ad corticem trunci arboris 

 crescens), eodem nomine in herb. Ach. denominatus, non est specimen 

 orig. et ad B. albescentem pertinet. F. chlorotica Vain, vix nisi notis 

 internis a B. albescente v. intermedia (Hepp) distingui potest. 



Ser. 2. Hymenium modice incrassatnm aut temie (crass, 

 circ. 0.060 — 0.035 mm). 



17. B. inundata (Fr.) Koerb. 



Syst. Lich. Germ. (1855) p. 187; Arn. Lich. Fragm. XI (1871) p. 

 54, Lich. Frank. Jur. (1884) p. 185, Zur Lich. Miinch. (1892) p. 19; Th. 

 Fr. Lich. Scand. II (1874) p. 350. Biatora Fr. Vet. Ak. Handl. (1822) p. 

 270. Lecidea Nyl. in Norrl. Ber. Torn. Lappm. (1873) p. 337; Nyl. Fl. 1875 

 p. 106; Hue Addend. II (1888) p. 166; Vain. Adj. Lich. Lapp. II (1883) 

 p. 15. Biatora luteola v. inundata Fr. Syst. Veg. Scand. (1846) p, 112. 

 Bacidia Arnoldiana i. inundata Koerb. Parerg. Lich. 2 Lief. (I860) p. 

 135. Lecidea luteola var. inundata Nyl. Lich. Scand. (1861) p. 209 (Enum. 



